unknown daughter Sinclair Peerage person ID=638418 Parents Elizabeth Douglas Sir Robert Sinclair of Longformacus, 1st Bt. Children Siblings George Sinclair Sir Archibald Sinclair Sir John Sinclair of Longformacus, 2nd Bt. Elizabeth Sinclair unknown daughter Sinclair Margaret Sinclair Anne Sinclair Jean Sinclair Partners Sir James Cockburn of Ryslor